Mineral: Meta-autunite
Locality: Margnac Mine, Compreignac, Bellac, Haute-Vienne Department, Nouvelle-Aquitaine, France
Dimensions: 22 x 14 x 11 cm / main crystal: 0.8 cm.

Description: Mass: 2950 g MIM number: 1380 Green-yellow tabular crystals carpeting the interior of a sandstone sandwich. Photographer: AINU / Augustin de Valence; Ex collection: Université Pierre et Marie Curie (France)

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